Here are some websites to get you started:
1. Visit the Centers for Disease Control and Prevention’s EXCITE Introduction to Epidemiology site at http://hickmancharterscioly.pbworks.com/f/EXCITE+_+Epidemiology+in+the+Classroom+_+Intro+Epi.pdf
2. Visit the UCLA Department of Epidemiology site – Broad Street Pump Epidemic http://www.ph.ucla.edu/epi/snow/broadstreetpump.html